Timeline: repair oldest/newest metrics if we fetch nothing

ts/test-node/util/combineNames_test.ts

@@ -0,0 +1,32 @@
+// Copyright 2020 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { assert } from 'chai';
+
+import { combineNames } from '../../util/combineNames';
+
+describe('combineNames', () => {
+  it('returns undefined if no names provided', () => {
+    assert.strictEqual(combineNames('', ''), undefined);
+  });
+
+  it('returns first name only if family name not provided', () => {
+    assert.strictEqual(combineNames('Alice'), 'Alice');
+  });
+
+  it('returns returns combined names', () => {
+    assert.strictEqual(combineNames('Alice', 'Jones'), 'Alice Jones');
+  });
+
+  it('returns given name first if names in Chinese', () => {
+    assert.strictEqual(combineNames('振宁', '杨'), '杨振宁');
+  });
+
+  it('returns given name first if names in Japanese', () => {
+    assert.strictEqual(combineNames('泰夫', '木田'), '木田泰夫');
+  });
+
+  it('returns given name first if names in Korean', () => {
+    assert.strictEqual(combineNames('채원', '도윤'), '도윤채원');
+  });
+});